Improvement in sewing-machines



Us JOHN FANNING @L EDWARD NUGENT;

Improvement in Sewing Machine.r

` Patented nec. 26, 1871.

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L ITED STATES PATENT OFFICE.

I JOHN FANNING AND EDWARD NUGENT, OF BROOKLYN, ASSIGNORS TO JOHN C.

ADAMS AND JOHN H. ANDRUS, OF BUFFALO, NEW YORK.`

IMPROVEMENT I'N SEWING-MACHINES.

Speciiication forming part of Letters Patent No. 122,113, dated December26, 1871.

Specification describing certain Improvements in Sewing-Machinesinvented by JOHN FANNLNG and EDWARD NUGENT, of Brooklyn, in the countyof Kings and State of New York.

Our invention consists in certain novel combinations and arrangements ofparts which have for their object to produce a sewing-machine capable ofbeing changed and adj usted at pleasure to sew either the ordinaryshuttle-stitch or the the double-loop stitch. v

Figure 1 of the drawing is an elevation of our improved machine separatefrom the stand rep resenting the back of the machine or the sideopposite to that at which the work is inserted in. Fig. 2 is a view ofthe under side of the machine. Fig. 3 is a view taken from theright-hand side ofFig. 1 with the faceplate C removed to show.thearrangement of the mechanism employed to drive the needle. Figs. 4and 5 are views in detail of the device employed to chan ge the relativetime of the movement of the looper with the needle when the machine isrequired to sew the double-loop stitch, Fig. 5 being a section throughthe line .1: m, Fig. 4. Fig. 6 is a sectional view through the line y y,Fig. 1, showing the looperoperating mechanism.

The parts A B represent the casting or frame of the machine in which theseveral operating parts have their bearings, the former constituting thebedplate, and the latter the arm for supporting the needle-operatingmechanism. The driving-shaft D has its bearings in the lugs H H on theunder side of the bed-plate and operates both It gives an oscillatingmotion to the needle-operating shaft E by means of the crank .0,connecting-rod Gr, strap N, and eccentric L, and it also gives avibrating movement to the' shuttle-driving and looper-operating lever F,throughthe eccentric K, strap N, and connecting-rod jointed to the leverat d. The needle-bar Q has a reciprocating motion given to it by thelink a, pivoted at c to the needle-bar, and at b to the disk P on theend of the oscillating shaft E. The extent of motion of the needle-baris governed by the length of the link a, which is pivoted at the end band held to the disk l? by the nut or set-screw at that end, whichpasses through a slot in the disk, and its motion can therefore beregulated by adjusting the link a. This arrangement is shown in thedetail view Fig. 3, where the faceplate C is removed and the position ofthe needle-bar when at its lowest pointv is represented by the .dottedlines. The lever F is provided with an arm, f, which drives theshuttle-carrier l through the medium of the link g, and has also anotherarm, e, which can be connected to the looper S when it is desired towork the double-loop stitch. When the looper S is not in operation it isheld back out of the way by the catch h on the under side of thebed-plate, and when the shuttle is not operating and is disconnectedfrom the end fof the lever it is held back in like manner by the springcatch i. The motion of the shaft E is at all times uniform with theshaft D, as the eccentric L is fixed on the shaft D, but the relativemovement of the eccentricK can be changed by virtue of the arrangementof the parts shown in the detail views, Figs. 4 and 5. The collar J,there shown, is Xed on the shaft D by a setscrew and has a pin, T,Vwhich passes through it and enters a hole in the eccentric K, thiseccentric being loose on the shaft D and turning with the collar J, aswill be readily understood. By this arrangement therelative time of thetwo eccentrics K L can be changed without deranging the other parts ofthe machine.

In Fig. 2 the machine is represented as being adjusted to sew the lockstitch with needle and shuttle, but when it is required to sew thedoubleloop stitch with needle and looper the shuttlecarrier isdisconnected from the arm f and held back by the catch i, and the pin inthe endof the looper S is slipped into the slot in end of the arm e ofthe lever F. The arm eis made of such length as to give the proper throwto the looper S, but as its time of movement with respect to the needlerequires to be changed, the pin T is and shaft D turned until the pin`engages in another hole in the eccentric K, made just forward of thefirst hole. This change will cause the eccentric K to operate upon thelever F a little sooner than it did when it occupied the working of thelpoper. It is also necessary when the machine is altered to sew thedouble-loop stitch to shorten the throw of the needle. This isaccomplished by loosening the screw b on the face of the disk P andshortening the link a the required amount, as this amount is governed bydrawn out of the eccentric K and the collar J,

former position, and is necessary to the proper l the length of the slotin the face of the disk l?,

so that the adjustment can be quickly and accurately made. The mechanismshown in Fig. 6 gives the proper vibratory movement to the looper S, Drepresenting the driving-shaft, V a cam secured upon it, and W avibrating arm operated by the cam'V.

We are aware of the patent No. 22,060 granted to Burnet and Broderick onthe 30th of November, 1858,`in Which the loop of needle-thread for thepassage of the shuttle is obtained by the use of a crank-connection uponthe needle-bar which rocks past its center, forms the loop, and thendescends during the passage ofthe shuttle through the loop 5 andV we,therefore, disclaim such device.

l. The combination and arrangement of the eccentrics K L,connecting-rods G M, crank 0, shaft E, crank P, and needle-bar Q, andits connection a, and the double-armed lever F, for operating theshuttle and needle, all constructed and operating substantially asdescribed and specified.

2. The double-armed lever F, constructed, arranged, and adapted to Workthe shuttle and looper, substantially as described.

3. The locking device, Fig. 4, for changing the positions of the needleand shuttle and the upper and under needle, when the machine isconverted or changed from one stitch to the other, constructedsubstantially as described and specied.

-4.-In combination withlthe above device for changingthe time of thevibrations of the lever F, the slotted disk P for changing the throw ofthe needle, constructed and operating substantially as described.

' J OHN FANN ING.

EDWARD NUGENT.

Witnesses:

C. A. DURGlN, ROBERCL` M. BERRY.

